No Ordinary Pirate. One piece X Male omnitrix user

It all started when an alien device did what it did, and stuck itself upon his wrist with secrets that it hid.
Y/n was given a second chance at life and reincarnated into the world of pirates as Monkey D. Y/n, the biological older brother of Monkey D. Luffy. One day before the brothers set sail, that alien device finally reveals itself-the Omnitrix.
Now he's got superpowers. He's no ordinary pirate.
So if you see him, you might be in for a big surprise. He'll turn into an alien before your very eyes. Slimy, freaky, fast and strong-he's every shape and size.
Armed with powers, Y/n joins Luffy and the Straw Hat Pirates, taking on pirates, Marines, monsters, and anything else standing between them and their dreams.
Fighting off evil from land or sea, he'll never stop till he makes them pay.
Because this isn't the story of an ordinary pirate.
He's the baddest pirate to ever save the day.